Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
11/20/2001 | 0000 | 01/07/2002 | 2359 | Missing |
Subject: | TWP/MPL/C2 - laser diode failure |
DataStreams: | twpmplcbh1scottC2.c0, twpmplnor1campC2.c1, twpmplcmask1clothC2.c1, twpmplsmask1clothC2.c1, twpmplC2.00, twpmplcbh1scottC2.c1, twpmplC2.a1 |
Description: | On Nov 20, 2001, following a data gap of several hours the MPL energy monitor reading showed an abrupt decrease of about 60%. The laser energy continued to decrease to a reading of zero by Nov 23. Cloud detection is satisfactory through Nov 21, but is not satisfactory after this time until the laser diode was replaced on Jan 08, 2002. Data between the dates of 2001-11-22 and 2002-01-08 inclusive is not useful. |
Suggestions: | Use alternate sources of cloud base height such as the millimeter cloud radar (MMCR) or the VCeil ceilometer. |
Measurements: | twpmplsmask1clothC2.c1: more
twpmplnor1campC2.c1: more twpmplC2.a1: more twpmplcbh1scottC2.c1: more twpmplC2.00: more twpmplcmask1clothC2.c1: more twpmplcbh1scottC2.c0: more |